What Does "Dictated But Not Read" Mean?

That means

"I spoke this message to my secretary or into my computer, and my secretary

or my computer did the writing. I didn't read what they wrote before it got sent

to you. So if you find any mis-spellings, or funny ridiculous words that obviously

don't belong here, it's all their fault, not mine. I was not only too lazy or busy to

make the effort to write to you myself, I was also too lazy or busy or didn't care

enough to check it over before it went out to you."

There's a bit of my own opinion in there, but I'm sure you get the idea.